Rx servers with Serial Attached Scsi (SAS disks)
Most of the new Rx have SaS controllers. and The SO mirror can be done using the hardware raid controller, and forget about software lvm mirroring with MirrorDisk/UX. I am used to breaking the SO mirror when patching, with this servers, I'm using another disk and making a drd pre-patch clone.
I just got a server with sas a couple of weeks ago, so I'm still getting the feel of it.
From the server you have the sasmgr tool with lots of options, for example the status of the disks in the raid 1 mirror:
rx01@root:/opt/sas/bin/>./sasmgr get_info -D /dev/sasd0 -q raid
Fri Mar 5 10:50:34 2010
---------- LOGICAL DRIVE 7 ----------
Raid Level : RAID 1
Volume sas address : 0xa0507cb191b1883
Device Special File : /dev/rdisk/disk23
Raid State : OPTIMAL
Raid Status Flag : ENABLED
Raid Size : 139898
Rebuild Rate : 0.00 %
Rebuild Progress : 100.00 %
Participating Physical Drive(s) :
SAS Address Enc Bay Size(MB) Type State
0x5000c5000c03d8b1 1 7 140014 PRIMARY ONLINE
0x5000c5000c041809 1 8 140014 SECONDARY ONLINE
I did the config of the raid1 mirror from the EFI with the drvcfg.
Here is info on configuring your raid with drvcfg:
http://docs.hp.com/en/5900-0112/5900-0112.pdf
All the info on hp smart arrays with sas: